B- A ball of mass 200 g travelling at 10 m/s/ is struck, by a stick so as to return it along its original path with a velocity at 5 m/s. Calculate the change of momentum occurred in the motion of the ball by the force applied by the stick

Consider a production line with five stations. station 1 can produce a unit in 9 minutes. station 2 can produce a unit in 10 minutes. station 3 has two identical machines, each of which can process a unit in 12 minutes (each unit only needs to be processed on one of the two machines. station 4 can produce a unit in 5 minutes. station 5 can produce a unit in 8 minutes. which station is the bottleneck station?